CN105590013A - Method for determining cross arm leeside load decreasing coefficient of transmission tower - Google Patents
Method for determining cross arm leeside load decreasing coefficient of transmission tower Download PDFInfo
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Abstract
The invention relates to a method for determining cross arm leeside load decreasing coefficient of a transmission tower. The method is determined based on a wind tunnel experiment. The method comprises the following steps: manufacturing a wind tunnel model; separating cross arm wind load; determining a cross arm shape coefficient; determining a cross arm windward side shape coefficient; determining a cross arm leeside shape coefficient; and determining the cross arm leeside load decreasing coefficient. According to the method, the more accurate cross arm leeside load decreasing coefficient based on the wind tunnel experiment can be provided.
Description
Technical field:
The present invention relates to determine that cross-arm lee face load reduces the method for coefficient, more specifically relate to a kind of based onWind tunnel test determines that transmission tower cross-arm lee face load reduces the method for coefficient.
Background technology:
In " overhead power transmission line pole tower structure-design technique regulation ", reduce system for lee face loadThe regulation of number is comparatively general, and tower body and cross-arm are all taken as a fixed value under all wind angles. This just neglectsOmited the appearance difference of cross-arm and tower body, and wind angle changes and lee face load is reduced to coefficient causesImpact, and the general terrain clearance of cross-arm is larger, wind speed is higher, and the value of lee face load reduction coefficient is inclined to one sidePoor larger on the impact of Wind load calculating precision on shaft tower. Therefore, be necessary by wind tunnel test identificationThe lee face load that obtains cross-arm under different wind angles reduces coefficient, to improve shaft tower Wind load calculating essenceDegree. For meeting this demand, the present invention proposes one and determine cross-arm lee face load based on wind tunnel testReduce the method for coefficient.
Summary of the invention:
The object of this invention is to provide the side that a kind of definite transmission tower cross-arm lee face load reduces coefficientMethod, the method can provide the lee face of the cross-arm more accurately load based on wind tunnel test to reduce coefficient.
For achieving the above object, the present invention by the following technical solutions: a kind of definite transmission tower cross-arm back of the bodyWind area load reduces the method for coefficient, and described method is determined based on wind tunnel test; Described method comprises followingStep:
(1) make wind tunnel model;
(2) separate cross-arm wind load;
(3) determine cross-arm Shape Coefficient;
(4) determine cross-arm windward side Shape Coefficient;
(5) determine cross-arm lee face Shape Coefficient;
(6) determine that cross-arm lee face load reduces coefficient.
A kind of definite transmission tower cross-arm lee face load provided by the invention reduces the method for coefficient, described inThe manufacturing process of step (1) is:
Selected cross-arm test section to be tested;
According to the cross dimensions of test chamber and cross-arm test section size, determine how much contractings of modellingChi ratio.
A kind of definite transmission tower cross-arm lee face load provided by the invention reduces the method for coefficient, described inModel comprises and the tower body of shaft tower is divided into former and later two monolithics and cross-arm is divided into four monolithics all around; ?The monolithic of described tower body and cross-arm is provided with bolt hole, is convenient to adopt different composite assembly schemes to eachMonolithic model is assembled.
Another preferred a kind of transmission tower cross-arm lee face load reduction coefficient of determining provided by the inventionMethod, the geometry scaling factor of described model is less than or equal to 1:10.
Preferred a kind of transmission tower cross-arm lee face load reduction coefficient of determining again provided by the inventionMethod, the cross-arm wind load of described step (2) deducts tower by the overall wind load of tower body and cross-armThe wind load of body obtains the true wind load of its effect.
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the cross-arm Shape Coefficient in described step (3) is determined by following formula:
μs＝CD＝-Cxsinβ-Cycosβ
Wherein, because model dynamometer check is carried out in uniform flow field, therefore resistance coefficient CDBe corresponding columnThe average somatotype coefficient μ of sections; Force coefficient C under body-axis coordinate system corresponding to modelx、Cy; β is wind-tunnelThe wind angle of test.
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the force coefficient C under body-axis coordinate system corresponding to described modelxAnd CyDetermine by following formula respectively:
Cx＝Fx/(0.5ρU2S)
Cy＝Fy/(0.5ρU2S)
Wherein, Fx、FyFor the true wind load under body-axis coordinate system corresponding on model cross-arm; U is ginsengThe incoming flow wind speed m/s examining; ρ is atmospheric density kg/m3; S is model reference area m2; B is with reference to longDegree m.
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the deterministic process of cross-arm windward side Shape Coefficient is in described step (4):
Determine that the monolithic model of measuring tower body and cross-arm entirety within the scope of 0 °～90 ° is under operating mode windwardWind load;
Determine and within the scope of 0 °～90 °, measure the wind load of tower body monolithic model under operating mode windward;
Determine the wind load F of cross-arm windward side at hypaxial each wind anglex1And Fy1；
Determine hypaxial force coefficient Cx1、Cy1Windward side Shape Coefficient with cross-arm under each wind angleCD (windward side)。
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the described monolithic model of measuring tower body and cross-arm entirety within the scope of 0 °～90 ° is in work windwardThe deterministic process of the wind load under condition is:
One monolithic model of tower body and cross-arm entirety is fixed in the mechanism of wind-tunnel drift angle to institute with a determining deviationStating spacing is determined and is fixed in the mechanism of wind-tunnel drift angle by cross-arm model drawing; Another by tower body and cross-arm entiretyOne monolithic model is connected on the force balance being fixed in the mechanism of wind-tunnel drift angle, and cope and drag pattern type is adjacent and notTest thereby contact;
Describedly within the scope of 0 °～90 °, measure the wind load of tower body monolithic model under operating mode windward reallyDetermining process is: a monolithic model of tower body is fixed in the mechanism of wind-tunnel drift angle with a determining deviation, described betweenApart from determining and be fixed in the mechanism of wind-tunnel drift angle by cross-arm model drawing, another tower body monolithic model is connected inBe fixed in the mechanism of wind-tunnel drift angle on force balance, cope and drag pattern type is adjacent and do not contact and test;
Deduct tower body single-piece molded at the wind load under operating mode windward with the monolithic model of tower body and cross-arm entiretyThe wind load of type under operating mode windward, obtains the wind load of cross-arm windward side at hypaxial each wind angleFx1、Fy1；
Determine and obtain hypaxial force coefficient C by described step (3)x1、Cy1With cross-arm at each windTo the windward side Shape Coefficient C under angleD (windward side)。
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the deterministic process of cross-arm lee face Shape Coefficient is in described step (5):
Determine that the monolithic model of measuring tower body and cross-arm entirety within the scope of 90 °～180 ° is in leeward operating modeUnder wind load;
Determine and within the scope of 90 °～180 °, measure the wind load of tower body monolithic model under operating mode windward;
Determine the wind load F of cross-arm windward side each wind angle under axonx2And Fy2；
Determine hypaxial force coefficient Cx2、Cy2With each wind angle Shape Coefficient of cross-arm windward sideCD (lee face)。
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, the described monolithic model of measuring tower body and cross-arm entirety within the scope of 90 °～180 ° is leewardThe deterministic process of the wind load under operating mode is: by a monolithic model of tower body and cross-arm entirety with a determining deviationBe fixed in the mechanism of wind-tunnel drift angle, described spacing is determined by cross-arm model drawing; By another tower body and cross-armThe monolithic model of entirety is connected in and is fixed in the mechanism of wind-tunnel drift angle on force balance, cope and drag pattern type adjacent andThereby do not contact and test;
It is described that within the scope of 90 °～180 °, to measure the wind load of tower body monolithic model under operating mode windward trueDetermining process is: a monolithic model of tower body is fixed in the mechanism of wind-tunnel drift angle with a determining deviation, described betweenApart from being determined by cross-arm model drawing; Another tower body monolithic model is connected in and is fixed in the mechanism of wind-tunnel drift angleOn force balance, do not contact and test thereby cope and drag pattern type is adjacent;
Deduct tower body single-piece molded at the wind load under operating mode windward with the monolithic model of tower body and cross-arm entiretyThe wind load of type under operating mode windward, obtains the wind load F of cross-arm windward side each wind angle under axonx2And Fy2；
Obtain hypaxial force coefficient C by described step (3)x2、Cy2With each wind of cross-arm windward sideTo angle Shape Coefficient CD (lee face)。
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, cross-arm lee face load in described step (6) reduces coefficient and determines by following formula:
Wherein, CD (lee face)For each wind angle Shape Coefficient of cross-arm windward side; CD (lee face)For cross-arm windwardEach wind angle Shape Coefficient of face.
Another preferred one provided by the invention determines that transmission tower cross-arm lee face load reduces coefficientMethod, described cross-arm wind load is by carrying out in axle system: when 0 degree angle of wind deflection, Y-axis forward points to incoming flow,The resistance that now model is subject to on the occasion of; X-axis vertical Y axle points to right.
With immediate prior art ratio, the invention provides technical scheme and there is following excellent effect
1, the invention provides and how to design a model and wind tunnel test scheme, and obtain respectively cross-arm windwardFace and lee face Shape Coefficient;
2, the present invention reduces the physical significance of coefficient according to cross-arm lee face load, has provided lee face lotusCarry and reduce coefficient formulas, better considered that cross-arm pattern and wind angle reduce system to lee face loadThe impact of number;
3, the more realistic stressing conditions of the more current specification value of the present invention;
4, the present invention can provide the lee face of the cross-arm more accurately load based on wind tunnel test to reduce coefficient;
5, the present invention improves shaft tower Wind load calculating precision.
Brief description of the drawings
Fig. 1 is the regulation figure of axon system of the present invention and wind angle;
Fig. 2 is cross-arm moulded dimension figure of the present invention;
Fig. 3 is tower body of the present invention and cross-arm monolithic model windward side dynamometry operating mode schematic diagram;
Fig. 4 is tower body monolithic model of the present invention windward side dynamometry operating mode schematic diagram;
Fig. 5 is tower body of the present invention and cross-arm monolithic model lee face dynamometry operating mode schematic diagram;
Fig. 6 is tower body monolithic model lee face dynamometry operating mode schematic diagram of the present invention;
1-monolithic cross-arm model force-measuring section, 2-monolithic cross-arm model disturbs section, 3-monolithic cross-arm model dynamometrySection, 4-monolithic cross-arm model disturbs section, 5-monolithic tower body model force-measuring section, 6-monolithic tower body model disturbsSection.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
As shown in Fig. 1-6, the invention of this example is a kind of determines that transmission tower cross-arm lee face load reduces coefficientMethod, described method based on wind tunnel test determine; Said method comprising the steps of:
The cross-arm total height 5.05m choosing, width 11.4m, in view of too small model may be introduced ReynoldsNumber effects, and rigidity of model is connected with member also can be difficult to guarantee, therefore, the geometry scaling factor of model is notShould be greater than 1:10. General test chamber width is 3m, is highly 2.5m, cross-arm model wideDegree should be slightly less than 2.5m, determines that accordingly model geometric scaling factor is 1:5, the model broadband after reduced scaleFor 2.28m, height 1.01m. Cross-arm moulded dimension as shown in Figure 2. Because of the wind lotus of tower body and cross-armCarry and need to measure respectively, therefore tower body and cross-arm need to be separated to making. Because of cross-arm windward side and lee face windLoad also needs to measure respectively, therefore finally tower body need to be divided into former and later two monolithics, before and after cross-arm is divided intoFour monolithics in left and right, and prepared screw-bolt hole, adopt different composite assembly schemes pair while being convenient to wind tunnel testEach monolithic model is assembled. According to this scaling factor, every cross-arm rod member is carried out after reduced scale, to weldThe mode that connects is made respectively two monolithic tower body models and four monolithic cross-arm models. At tower body model and cross-armPrepared screw-bolt hole position, link position place on model, carries out the composite assembly of model according to test demand.
Because need to being fixed on tower body, cross-arm carries out wind tunnel test, therefore, and cannot be directly to certain a pair of cross-armWind load test, can only test together with supporting its tower body sections cross-arm. For from tower bodyThe middle tower body wind load of rejecting of making a concerted effort with cross-arm, is really acted on the wind load on cross-arm, also needsTower body wind load is tested separately. The then wind of making a concerted effort to deduct tower body part together with cross-arm with tower bodyLoad, the true wind load that obtains acting on cross-arm.
Cross-arm wind load provides according to axon system, and when regulation 0 degree angle of wind deflection, Y-axis forward points to incoming flow,The resistance that now model is subject to is on the occasion of, the X axis right side, and the regulation of axon system and wind angle is as 1, accompanying drawingShow.
First test windward side Shape Coefficient. The a certain monolithic model of tower body+cross-arm is connected in to dynamometry skyFlat upper (force balance is fixed in the mechanism of wind-tunnel drift angle), the monolithic model of another tower body+cross-arm is with necessarilySpacing is fixed in the mechanism of wind-tunnel drift angle, and described spacing is determined by cross-arm model drawing, described model drawingDetermine according to designing requirement, and before and after guaranteeing, cope and drag pattern type is adjacent and do not contact, at 0 °～90 ° modelsThe wind load of the monolithic model that encloses interior mensuration tower body+cross-arm under operating mode windward. Wind-tunnel under this operating modeTest schematic diagram as shown in Figure 3.
Again a certain monolithic model of tower body is connected in on force balance, (force balance is fixed on wind-tunnel drift angleIn mechanism), another tower body monolithic model is fixed in the mechanism of wind-tunnel drift angle with a determining deviation equally, described inSpacing is definite by cross-arm model drawing, and described model drawing is determined according to designing requirement, and guaranteed front and back twoSheet model is adjacent and do not contact, and measures tower body monolithic model in operating mode windward within the scope of 0 °～90 °Under wind load. Wind tunnel test schematic diagram under this operating mode as shown in Figure 4.
Deducting tower body monolithic model with the monolithic model of tower body+cross-arm at the wind load under operating mode windward again existsWind load under operating mode windward, obtains the wind load F of cross-arm windward side at hypaxial each wind anglex1、Fy1. Wind load value is updated to and in formula (1), obtains hypaxial force coefficient Cx1、Cy1, by force coefficientSubstitution formula (2) obtains the windward side Shape Coefficient C of cross-arm under each wind angleD (windward side)。
Cx＝Fx/(0.5ρU2S)；Cy＝Fy/(0.5ρU2S)(1)
By the cross-arm windward side Shape Coefficient that calculates as following table 1:
Table 1
Then test lee face Shape Coefficient. The a certain monolithic model of tower body+cross-arm is connected in to dynamometry skyFlat upper (force balance is fixed in the mechanism of wind-tunnel drift angle), the monolithic model of another tower body+cross-arm is with necessarilySpacing is fixed in the mechanism of wind-tunnel drift angle, and described spacing is determined by cross-arm model drawing, described model drawingDetermine according to designing requirement, and before and after guaranteeing, cope and drag pattern type is adjacent and do not contact, at 90 °～180 °The wind load of the monolithic model of mensuration tower body+cross-arm under leeward operating mode in scope. Wind under this operating modeHole test schematic diagram as shown in Figure 5.
Again a certain monolithic model of tower body is connected in on force balance, (force balance is fixed on wind-tunnel drift angleIn mechanism), the same determining deviation of another tower body monolithic model is fixed in the mechanism of wind-tunnel drift angle, described betweenApart from being determined by cross-arm model drawing, described model drawing is determined according to designing requirement, and is guaranteed two of front and backModel is adjacent and do not contact, and measures tower body monolithic model in leeward operating mode within the scope of 90 °～180 °Under wind load. Wind tunnel test schematic diagram under this operating mode as shown in Figure 6.
With the monolithic model of tower body+cross-arm, the wind load under leeward operating mode deducts tower body monolithic model and exists againWind load under leeward operating mode, obtains the wind load F of cross-arm lee face at hypaxial each wind anglex1、Fy1. Wind load value is updated to and in formula (1), obtains hypaxial force coefficient Cx1、Cy1, by force coefficientSubstitution formula (2) obtains the lee face Shape Coefficient C of cross-arm under each wind angleD (windward side)。
μs＝CD＝-Cxsinβ-Cycosβ(2)
By the cross-arm lee face Shape Coefficient that calculates as following table 2:
Table 2
The cross-arm lee face Shape Coefficient obtaining by wind tunnel test and windward side Shape Coefficient are updated toIn formula (3), obtain the lee face load of this type of cross-arm under different wind angles reduce coefficient η asShown in following table 3:
Table 3
Finally should be noted that: above embodiment is only in order to technical scheme of the present invention to be described but not to itRestriction, although those of ordinary skill in the field are to be understood that with reference to above-described embodiment: still can be rightThe specific embodiment of the present invention is modified or is equal to replacement, and these do not depart from spirit of the present invention and modelAny amendment of enclosing or be equal to replacement, the claim protection domain of the present invention all awaiting the reply in application itIn.
Claims (13)
1. definite transmission tower cross-arm lee face load reduces a method for coefficient, and described method is based on wind-tunnelTest is determined; It is characterized in that: said method comprising the steps of:
(1) make wind tunnel model;
(2) separate cross-arm wind load;
(3) determine cross-arm Shape Coefficient;
(4) determine cross-arm windward side Shape Coefficient;
(5) determine cross-arm lee face Shape Coefficient;
(6) determine that cross-arm lee face load reduces coefficient.
2. a kind of definite transmission tower cross-arm lee face load as claimed in claim 1 reduces the method for coefficient,It is characterized in that: the manufacturing process of described step (1) is:
Selected cross-arm test section to be tested;
According to the cross dimensions of test chamber and cross-arm test section size, determine how much reduced scales of modellingRatio.
3. a kind of definite transmission tower cross-arm lee face load as claimed in claim 2 reduces the method for coefficient,It is characterized in that: described model comprises that the tower body of shaft tower is divided into former and later two monolithics and cross-arm is left before and after being divided intoRight four monolithics; On the monolithic of described tower body and cross-arm, be provided with bolt hole, be convenient to adopt different combinations to spellDress scheme is assembled each monolithic model.
4. a kind of definite transmission tower cross-arm lee face load as claimed in claim 3 reduces the method for coefficient,It is characterized in that: the geometry scaling factor of described model is less than or equal to 1:10.
5. a kind of definite transmission tower cross-arm lee face load as claimed in claim 1 reduces the method for coefficient,It is characterized in that: the cross-arm wind load of described step (2) deducts tower by the overall wind load of tower body and cross-armThe wind load of body obtains the true wind load of its effect.
6. a kind of definite transmission tower cross-arm lee face load as claimed in claim 4 reduces the method for coefficient,It is characterized in that: the cross-arm Shape Coefficient in described step (3) is determined by following formula:
μs＝CD＝-Cxsinβ-Cycosβ
Wherein, because model dynamometer check is carried out in uniform flow field, therefore resistance coefficient CDBe corresponding column sectionAverage somatotype coefficient μs; Force coefficient C under body-axis coordinate system corresponding to modelx、Cy; β is wind tunnel testWind angle.
7. a kind of definite transmission tower cross-arm lee face load as claimed in claim 6 reduces the method for coefficient,It is characterized in that: the force coefficient C under body-axis coordinate system corresponding to described modelxAnd CyDetermine by following formula respectively:
Cx＝Fx/(0.5ρU2S)
Cy＝Fy/(0.5ρU2S)
Wherein, Fx、FyFor the true wind load under body-axis coordinate system corresponding on model cross-arm; U is referenceIncoming flow wind speed m/s; ρ is atmospheric density kg/m3; S is model reference area m2; B is reference length m.
8. a kind of definite transmission tower cross-arm lee face load as claimed in claim 7 reduces the method for coefficient,It is characterized in that: in described step (4), the deterministic process of cross-arm windward side Shape Coefficient is:
Determine that the monolithic model of measuring tower body and cross-arm entirety within the scope of 0 °～90 ° is under the operating mode windwardWind load;
Determine and within the scope of 0 °～90 °, measure the wind load of tower body monolithic model under operating mode windward;
Determine the wind load F of cross-arm windward side at hypaxial each wind anglex1And Fy1；
Determine hypaxial force coefficient Cx1、Cy1Windward side Shape Coefficient with cross-arm under each wind angleCD (windward side)。
9. a kind of definite transmission tower cross-arm lee face load as claimed in claim 8 reduces the method for coefficient,It is characterized in that: the described monolithic model of measuring tower body and cross-arm entirety within the scope of 0 °～90 ° is in work windwardThe deterministic process of the wind load under condition is:
One monolithic model of tower body and cross-arm entirety is fixed in the mechanism of wind-tunnel drift angle with a determining deviation, described inSpacing is determined by cross-arm model drawing; Another monolithic model of tower body and cross-arm entirety is connected in and is fixed on windOn force balance in the mechanism of drift angle, hole, do not contact and test thereby cope and drag pattern type is adjacent;
Described the determining of the wind load of tower body monolithic model under operating mode windward of measuring within the scope of 0 °～90 °Process is: a monolithic model of tower body is fixed in the mechanism of wind-tunnel drift angle with a determining deviation, described spacing byCross-arm model drawing is determined, another tower body monolithic model is connected in and is fixed on dynamometry sky in the mechanism of wind-tunnel drift angleFlat upper, cope and drag pattern type is adjacent and do not contact and test;
Deducting tower body monolithic model with the monolithic model of tower body and cross-arm entirety at the wind load under operating mode windward existsWind load under operating mode windward, obtains the wind load F of cross-arm windward side at hypaxial each wind anglex1、Fy1；
Determine and obtain hypaxial force coefficient C by described step (3)x1、Cy1With cross-arm at each wind angleUnder windward side Shape Coefficient CD (windward side)。
10. the side that a kind of definite transmission tower cross-arm lee face load as claimed in claim 7 reduces coefficientMethod, is characterized in that: in described step (5), the deterministic process of cross-arm lee face Shape Coefficient is:
Determine that the monolithic model of measuring tower body and cross-arm entirety within the scope of 90 °～180 ° is under leeward operating modeWind load;
Determine and within the scope of 90 °～180 °, measure the wind load of tower body monolithic model under operating mode windward;
Determine the wind load F of cross-arm windward side each wind angle under axonx2And Fy2；
Determine hypaxial force coefficient Cx2、Cy2With cross-arm windward side each wind angle Shape Coefficient CD (lee face)。
The side that 11. a kind of definite transmission tower cross-arm lee face loads as claimed in claim 10 reduce coefficientMethod, is characterized in that: the described monolithic model of measuring tower body and cross-arm entirety within the scope of 90 °～180 ° existsThe deterministic process of the wind load under leeward operating mode is: by a monolithic model of tower body and cross-arm entirety with between certainApart from being fixed in the mechanism of wind-tunnel drift angle, described spacing is determined by cross-arm model drawing; By another tower body and cross-armThe monolithic model of entirety is connected in and is fixed in the mechanism of wind-tunnel drift angle on force balance, and cope and drag pattern type is adjacent and notTest thereby contact;
The described wind load of tower body monolithic model under operating mode windward of measuring within the scope of 90 °～180 ° determinedProcess is: a monolithic model of tower body is fixed in the mechanism of wind-tunnel drift angle with a determining deviation, described spacing byCross-arm model drawing is determined; Another tower body monolithic model is connected in and is fixed on dynamometry sky in the mechanism of wind-tunnel drift angleFlat upper, do not contact and test thereby cope and drag pattern type is adjacent;
Deducting tower body monolithic model with the monolithic model of tower body and cross-arm entirety at the wind load under operating mode windward existsWind load under operating mode windward, obtains the wind load F of cross-arm windward side each wind angle under axonx2And Fy2；
Obtain hypaxial force coefficient C by described step (3)x2、Cy2With each wind angle of cross-arm windward sideShape Coefficient CD (lee face)。
The side that 12. a kind of definite transmission tower cross-arm lee face loads as claimed in claim 1 reduce coefficientMethod, is characterized in that: the cross-arm lee face load in described step (6) reduces coefficient and determines by following formula:
Wherein, CD (lee face)For each wind angle Shape Coefficient of cross-arm windward side; CD (lee face)For cross-arm windward side eachIndividual wind angle Shape Coefficient.
The side that 13. a kind of definite transmission tower cross-arm lee face loads as claimed in claim 7 reduce coefficientMethod, is characterized in that: described cross-arm wind load is by carrying out in axle system: when 0 degree angle of wind deflection, Y-axis forward points toIncoming flow, the resistance that now model is subject to on the occasion of; X-axis vertical Y axle points to right.
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| CN110263480A (en) * | 2019-06-28 | 2019-09-20 | 中国铁塔股份有限公司 | The total wind load and wind load reduction coefficient calculation method and relevant device of three towers |
| CN110501136A (en) * | 2019-09-30 | 2019-11-26 | 大连理工大学 | The ocean platform wind load forecasting procedure of any wind profile is adapted to based on the specific wind profile of test |
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